Subject: Why can your eye focus on objects clearer when light is eliminated

I have experimented with a nearsighted person by removing his glasses and 
letting him look at an object with the use of "pin-hole" glasses.  The 
glasses remove all of the light around the object and make the object as 
clear as if he were wearing his regular glasses.  I would like to do a 
science fair project using a reduction of light demonstration.  Thanks.

Re: Why can your eye focus on objects clearer when light is eliminated